Hacker Trojan horse mining
mining Trojan horse is now in the limelight, and its gold sucking power is catching up with blackmail virus. Recently, 360 security guard intercepted a Monroe coin mining Trojan horse spread by "eternal blue". Due to carrying heavy attack ammunition, the Trojan horse spread a large amount, reaching 100000 times a day at the peak, and 360 recently intercepted more than one million attacks
it is understood that this is a large-scale attack of mining Trojan horse carrying "eternal blue" against ordinary Internet users. In order to prevent computers from becoming the coolie of hackers mining, 360 reminds Internet users to ensure that they are well patched and immune to all kinds of attacks using "eternal blue", and at the same time, 360 security guard is opened to comprehensively defend against all kinds of mining Trojan horse
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Before we learned a simple price situation of enamel steel plate, this time, Xiaobian will take you to have a more in-depth understanding of the proction process of enamel steel plate. We mentioned that enamel steel plate is a kind of composite material, so the proction process is relatively more complex, but its material performance is good, and its appearance is also good-looking, which can be used in many different places. Then come to understand the proction process of this enamel steel plate
I. conditions of enamel steel plate
1. The carbon content is 0.08 ~ 0.12%
2. The surface structure is uniform
3. It is suitable for stretch forming, not easy to crack and wrinkle
4. It is suitable for welding, easy to clean
5. It is not easy to deform and bend ring firing. At present, the commonly used plates and models in China are Baosteel btc1, Maanshan spcc-1dc01, etc
Second, the glaze should have a wide range of firing temperature and resistance to firing, and the coefficient of thermal expansion is appropriate, After firing, it is not easy to proce cracks and deformation5. It has certain explosion-proof performance
the grinding additive and function of glaze formula
1, clay 2, quartz 3, electrolyte (nitrous borax)
the function of clay:
1 as the suspending agent of glaze, plays a suspending role
2, Clay can affect the physical structure and expansion coefficient of enamel ring sintering. Clay can change the covering power, whiteness and luster of enamel. Electrolyte: nitrite: antirust effect. Generally, 0.2-0.5% borax is used as melting aid. The standard thickness of steel plate enamel is 80-120um, The primary glaze is 120 ~ 150um
surface glaze: the surface glaze is divided into base glaze and titanium glaze
the base glaze is mainly used for color matching, the base glaze needs to have good luster and porcelain surface, glue resistance, and it is not easy to proce glue film after Decal
the white glaze needs to have good hiding power and luster, Acid resistance
the thickness of surface glaze is generally 150 ~ 200um
test index and method of glaze slurry:
1 particle size (coarse and fine) 2 specific gravity (solution weight) 3 retention (adhesion)
glaze slurry particle size test
take 50ml glaze slurry and wash it with 200 mesh screen water, After the resial porcelain powder is dried, the following results can be obtained:
standard particle size: down lead: 6-8g surface glaze: 3-5g colored glaze: 2-4G
specific gravity:
take 100ml glaze slurry into a Pycnometer (set bottle weight 50g), The total weight minus the bottle weight can be obtained as follows:
specific gravity requirements: pot cover: down lead 169-170g / 100ml surface glaze: 172-174g / 100ml colored glaze: 172-174g / 100ml
pot body: down lead 166-167g / 100ml surface glaze: 167-169g / 100ml colored glaze: 167-169g / 100ml
adhesion test:
take the plate thickness of 1mm, length and width of 100cm × 10cm stainless steel sheet (set weight as 50g) is placed in the glaze slurry after mixing, and the glaze slurry does not continue to drop until it is lifted vertically (not fast or slow). After weighing and recing the weight of stainless steel sheet, the adhesion amount is
pot cover: downward: 12g / 10 × 10cm white glaze: 14g / 10 × 10cm color glaze: 14g / 10 × 10cm
pot body downward: 7g / 10 × 10cm white glaze: 9g / 10 × 10cm color glaze: 9g / 10 × 10cm
aging of glaze slurry:
the glaze slurry needs to be aged for 36-48 hours before use, which is very important. It can improve the working properties and operating performance of glaze slurry, but if the aging time is prolonged, it will be harmful to the properties of glaze slurry, The surface glaze is generally added (potassium carbonate + magnesium sulfate). Before use, take a small amount of glaze slurry and adjust the thickness. Add the thickness adjusted glaze slurry into the glaze slurry to be adjusted, so as to avoid small bubbles and affect the performance of glaze slurry
In order to improve the unevenness of enameling powder, it is better to adopt natural dripping operation, so as to achieve uniform thickness, rationalization of action, standardization of operation, and save physical strength, so as to rece the defect rate, improve proct quality, rece the amount of glaze slurry, and save cost, Generally follow the principle that the proportion of large procts is slightly lower, the proportion of small procts is slightly higher, and the cover is slightly higher than the pot body2 gesture should be consistent as far as possible, the bottom should be swung 4-5 times, and the two sides should be swung about 2 times, and the force should be subject to the swing of the penlum.
3 when soaking the pot body, it should be 360 degrees to the edge of the pot, not to the bottom, so as to avoid the horizontal bar or too thick bottom, The manufacturing process of enamel steel plate is relatively complex, so we pay attention to the accuracy of hand gestures in the process of firing and enamelling. The accuracy of hand gestures can save the beauty of the finished proct and the amount of raw materials. In addition, in the manufacturing process of enamel steel plate will encounter some more difficult to solve problems, these problems depend on everyone's experience in the actual operation to improve his practice
Nice hash, a Slovenian mining platform, issued a statement on its official website on Thursday, claiming that the platform was attacked by hackers and a large number of bitcoins were stolen. At present, all services of the platform have been shut down
nice hash said that the theft of bitcoin was e to the invasion of wallet. The company is verifying the number of bitcoin stolen and cooperating with relevant departments to investigate. According to the address where the bitcoin wallet is stored, more than 4700 bitcoins were stolen this time
According to Sergey yunakovsky, a malware analyst at Kaspersky Labs, cryptocurrency is no longer a distant technology. Recently, we have observed an increase in malware attacks against different types of cryptocurrencies, and we expect this trend to continueand the soaring price of cryptocurrency is the main reason why they are targeted by hackers. Bitcoin staged a crazy rise this week. With the launch of bitcoin futures in the U.S. market on Saturday approaching, the market fever of bitcoin reached a new climax on Thursday. The price of the digital currency soared by about 40% in about 40 hours, breaking the five thousand yuan barrier in a row, and rising to more than $17000. On Thursday, bitcoin prices on some exchanges even rose above $19000, up more than 50% in 24 hours